<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <select onchange="chage(this)">
        <option value="1">tab1</option>
        <option value="2">tab2</option>
        <option value="3">tab3</option>
        <option value="4">tab4</option>
    </select>
    <div id="box"></div>
    <script>
        function chage(row){
            console.log(row);
        }
        let box = document.getElementById("box");
        console.log(box);
        for (let index = 0; index < 10; index++) {
            box.innerHTML += '<div onclick="click(i)">1<div>'
            
        }
        let arr = [[1,2,34,4,5],[2,3,45,7,8],[5,7,8,0,4]]
        let [a,b,c] = arr; 
        console.log(a);
    </script>
</body>
</html>